<template>
  <div class="star" :class="starType">
   <span v-for="itemClass in itemClasses" class="star-item" :class="itemClass"></span>
  </div>
</template>

<script>
const LENGTH = 5;
const CLS_ON = 'on';
const CLS_HALF = 'half';
const CLS_OFF = 'off';
export default {
  name: 'Star',
  props: {
    size: {
      type: Number
    },
    score: {
      type: Number
    }
  },
  computed: {
    starType () {
      return 'star-' + this.size;
    },
    itemClasses() {
      let result = [];
      let score = Math.floor(this.score * 2) / 2;
      let hasDecimal = score % 1 !== 0;
      let integer = Math.floor(score);
      for(var i=0;i<integer;i++){
        result.push(CLS_ON);
      }
      if(hasDecimal){
        result.push(CLS_HALF);
      }
      while(result.length<LENGTH){
        result.push(CLS_OFF)
      }
      return result;
    }
  }
}
</script>

<style lang="stylus" rel="stylesheet/stylus" scoped>
  @import "../../common/stylus/mixin.styl"

  .star
    font-size: 0
    .star-item
      display: inline-block
      background-repeat: no-repeat
    &.star-48
      .star-item
        width: 20px
        height: 20px
        margin-right: 22px
        background-size: 20px 20px
        &:last-child
          margin-right: 0
        &.on
          bg-image('star48_on')
        &.half
          bg-image('star48_half')
        &.off
          bg-image('star48_off')
    &.star-36
      .star-item
        width: 15px
        height: 15px
        margin-right: 6px
        background-size: 15px 15px
        &:last-child
          margin-right: 0
        &.on
          bg-image('star36_on')
        &.half
          bg-image('star36_half')
        &.off
          bg-image('star36_off')
    &.star-24
      .star-item
        width: 10px
        height: 10px
        margin-right: 3px
        background-size: 10px 10px
        &:last-child
          margin-right: 0
        &.on
          bg-image('star24_on')
        &.half
          bg-image('star24_half')
        &.off
          bg-image('star24_off')
</style>